Latest Cover

Online Office

Contact Us

Issue:ISSN 2095-1353
           CN 11-6020/Q
Director:Chinese Academy of Sciences
Sponsored by:Chinese Society of Entomological;institute of zoology, chinese academy of sciences;
Address:Chaoyang District No. 1 Beichen West Road, No. 5 hospital,Beijing City,100101, China
Tel:+86-10-64807137
Fax:+86-10-64807137
Email:entom@ioz.ac.cn
Your Position :Home->Past Journals Catalog->2010年47 No.5

Spatial distribution patterns and theoretical sampling of Sogatella furcifera of nymph in rice terrace fields in Yuanyang.
Author of the article:
Author's Workplace:
Key Words:Sogatella furcifera, spatial distribution pattern, negative binomial distribution, distribution parameters, Yuanyang Terrace, Yunnan
Abstract:       Dispersal indices, and the Iwao and Taylor regression methods, were used to investigate the spatial distribution and theoretical sample size of Sogatella furcifera (Horvath) nymphs in rice terrace fields at different altitudes in Yuanyang, Yunnan. Results show that younger nymphs had a negative binomial spatial pattern which was the result of their intrinsic biological characteristics and environmental factors.Iwao’s m*-m regression model was m*=3.96+1.09 m(R=0.97) ,and Taylor’s V-m regression model was lg(V)=0.28+1.34×lg(m)(R=0.85). The K\|value of the negative binomial distribution was 3.53. The aggressive intensity coefficient was significantly different at different altitudes (F=5.77,P<0.01); 10.74±0.83,23.67±3.50,21.64±6.02,47.10±5.71,52.59±12.75 and 13.72±3.14 in rice fields at altitudes of 1 400-1 500 m,1 501-1 600 m,1 601-1 700 m,1 701-1 800 m,1 801-1 900 m and 1 901-2 000 m, respectively. The maximum aggressive intensity coefficient was in rice fields at altitudes of 1 701-1 800 and 1 801-1 900 m, and the minimum was in rice fields at altitudes of 1 400-1 500 and 1 901-2 000 m. Theoretical sampling equations were n=1 905.43x+34.57, n=476.36x+8.64, which gives the estimated sample size for different densities of nymphs with an accuracy of 0.1 and 0.2 respectively. According to the above equations, 30,20 and 15 sampling units should be sampled when the density of the S. furcifera is assumed to be 5,10 and 20 individuals per sampling unit.These results provide a basis for the scientific sampling and control of this pest.
CopyRight©2024 Chinese Journal of Aplied Entomology